Operating Revenues (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Total operating revenues disaggregated by asset type were as follows:

	Millions of Dollars
	2019		2018	2017*
Pipelines	$	473	454	424
Terminals	167		157	152
Storage, processing and other revenues	486		434	358
Total operating revenues	$	1,126	1,045	934

* Sales and other operating revenues for the year ended December 31, 2017, are presented in accordance with accounting standards in effect prior to our adoption of ASU No. 2014-09 on January 1, 2018.

Accounts Receivable

Total accounts receivable by revenue type was as follows:

	Millions of Dollars
	2019		2018
Lease receivables	$	87	53
Service receivables	18		41
Other receivables	—		1
Total accounts receivable	$	105	95

Deferred Revenues

Total deferred revenues under our lease and service agreements were as follows:

	Millions of Dollars
	2019		2018
Deferred lease revenues	$	41	73
Deferred service revenues	1		6
Total deferred revenues	$	42	79

Schedule of Future Minimum Payments Receivable

At December 31, 2019, future minimum payments to be received under our lease agreements with customers were estimated to be:

	Millions of Dollars
2020	$	697
2021	692
2022	680
2023	636
2024	516
Remaining years	1,353
Total future minimum lease payments from customers	$	4,574

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

At December 31, 2019, future service revenues expected to be recognized for the fixed component of the transaction price of our remaining performance obligations from service contracts with our customers that have an original expected duration of greater than one year were:

	Millions of Dollars
2020	$	146
2021	137
2022	136
2023	136
2024	116
Remaining years	671
Total future service revenues	$	1,342